Ah hun its totally possible for you to continue your education. Your baby wont be born before the end of this year, so you can carry on as normal with your AS levels, then you could take a year out, your college will do that,its no problem, thats the joy of the AS/A2 system. By that time your baby will be 1 year old and sleeping more through the night, and be old enough to go into childcare or just stay with a relative while you're in college. A lot of working mums go back to work after the baby is 1 so your situation wouldnt be any different from the norm. Once you've finished your A2s you'll have a lot of choices, if you think Uni is on the cards, then maybe take another year or 2 out and start uni when your little one starts school.
I know this all seems quite scary but Im just giving an example of how you could do it. It might take a couple more years to get through it but in the mong run it doesnt really matter as long as you get the education you planned for in the end.
Good luck with your boyfriend, my boyfriend is 28 and we've been living together for 2 years and he found it hard to deal with lol, give him some space, but make sure you invite him to appointments etc... the more involved he is the quicker he will come to terms with it. We had our scan the other day and it was so amazing,I went to the loo after and came out and he was crying the corridoor and smiling at the smae time looking at the pics, then he just said "Im gonna be a daddy" and gave me a massive hug.
I think men need to see it to believe it (not as bright as us girls!!
)
I was really nervous about telling my parents because they are quite old fashioned and we're not married but they are so excited, like you said, the thought of getting a grandchild is a wonderful thing for your parents. They will worry about you, but all you can do about that is ask them to trust and support you, and show them how mature you are and how well you will cope and they will be bursting with pride.
Good luck with your doctors appointment, take the time to ask as many questions as you need to. And I would advise telling your parents asap, even though I know its the scariest thing, once they've got over the shock, their support and advice will be essential to you, after all, your mum has been through it herself! x